Liliidae is a botanical name at the rank of subclass.[1] Circumscription of the subclass will vary with the taxonomic system being used (there are many such systems); the only requirement being that it includes the family Liliaceae.
The Takhtajan system treats this as one of six subclasses within class Liliopsida (= monocotyledons). This subclass consists of:
superorder Lilianae
order Melanthiales
order Colchicales
order Trilliales
order Liliales
order Alstroemeriales
order Iridales
order Tecophilaeales
order Burmanniales
order Hypoxidales
order Orchidales
order Amaryllidales
order Asparagales
order Xanthorrhoeales
order Hanguanales
superorder Dioscoreanae
order Stemonales
order Smilacales
order Dioscoreales
order Taccales
The Cronquist system treats this as one of five subclasses within class Liliopsida (= monocotyledons), and it consists of:
order Liliales
order Orchidales
In the Dahlgren system and the Thorne system (1992) this is an important name: this subclass comprises the monocotyledons (in APG II these are the monocots).
superorder Alismatanae
superorder Triuridanae
superorder Aranae
superorder Lilianae
superorder Bromelianae
superorder Zingiberanae
superorder Commelinanae
superorder Arecanae
superorder Cyclanthanae
superorder Pandananae
(in the version of the system as depicted by Reveal)
superorder Lilianae
superorder Hydatellanae
superorder Triuridanae
superorder Aranae
superorder Cyclanthanae
superorder Pandananae
superorder Arecanae
The APG and APG II systems do not use formal botanical names above the rank of order, and names such as Liliopsida and Liliidae have no place in these systems.